Difference between revisions of "Packera ogotorukensis"
Bot. Not. 128: 520. 1976.
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|common_names=Ogotoruk Creek ragwort | |common_names=Ogotoruk Creek ragwort | ||
| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Senecio ogotorukensis | |name=Senecio ogotorukensis | ||
|authority=Packer | |authority=Packer | ||
| + | |publication_title=Canad. J. Bot. | ||
| + | |publication_place=50: 511, figs. 2, 3, 7. 1972 | ||
}} | }} | ||
|synonyms= | |synonyms= | ||
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|publication year=1976 | |publication year=1976 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V20_1330.xml |
|tribe=Asteraceae tribe Senecioneae | |tribe=Asteraceae tribe Senecioneae | ||
|genus=Packera | |genus=Packera | ||
Revision as of 18:41, 24 September 2019
Perennials, 8–15+ cm; fibrous-rooted or ± rhizomatous (bases horizontal to ascending). Stems 1 (often branched proximally, sometimes distally), sparsely to densely floccose-tomentose. Basal leaves petiolate; blades elliptic to oblanceolate or ovate, 20–80+ × 20–60+ mm, bases tapering, margins entire, crenate-serrate, or irregularly to pinnately lobed (abaxial faces white-tomentose, adaxials patchy tomentose to glabrate). Cauline leaves gradually to abruptly reduced (sessile; mids lanceolate to oblanceolate, irregularly serrate to pinnately lobed, distals bractlike). Heads 1(–3). Peduncles bracteate, ± tomentose. Calyculi conspicuous (bractlets purple-tinged). Phyllaries 13 or 21, green (sometimes with purple streaks, tips usually purple), 4–8 mm, proximally tomentose, rarely glabrous. Ray florets 10–13+; corolla laminae 8–12+ mm. Disc florets 60–70+; corolla tubes 1–1.5 mm, limbs 2–2.5 mm. Cypselae 1–1.5 mm, glabrous; pappi 2.5–3 mm. 2n = 92.
Phenology: Flowering mid Jun–mid Jul (maritime), early Jul–early Aug (continental).
Habitat: Open rocky/gravelly areas, tundra, talus slopes, stream banks, roadsides
Elevation: 0–1800 m
Distribution
B.C., N.W.T., Yukon, Alaska.
Discussion
Plants of Packera ogotorukensis have been treated as a disjunct of P. conterminus (as Senecio conterminus). Gross morphology, cytological data, and pollen morphology all provide good evidence for recognition of P. ogotorukensis as a distinct species.
Selected References
None.